Abstract
The interaction between a wave and a warm plasma has been studied by making use of Langevin’s equation. Collisions between electrons and heavy ions and the electric field caused by the group displacement is taken into account. The propagation of a radio wave in the plasma is investigated. The relationship between the current density and the oscillating electric field is obtained. In the limit of the electric field caused by displacement of charges approaching zero, the results become as those obtained by Margenau. The effect of variable collision frequency has also been included in the theory.
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